Microsoft just announced the following games will be coming to their GamePass service in July 2018. Also, Fallout 4, The Division, and The Elder Scrolls Online: Tamriel Unlimited have recently become available.
JULY 1, 2018:
DiRT 4
Zombie Army Trilogy
ABZU
Shadow Complex Remastered
Elder Scrolls IV: Oblivion
Fallout 3
Human Fall Flat
JULY 10, 2018:
Bomber Crew
JULY 11, 2018:
Warhammer: Vermintide 2